The Audio-Technica U851Rb is a cardioid condenser boundary microphone in black, delivering outstanding speech intelligibility and transparent sound quality for surface-mount applications. Equipped with a PivotPoint rotating output connector, UniSteep filter and UniGuard RFI-shielding technology, it accepts interchangeable condenser elements and is built around a heavy die-cast case with silicon foam bottom pads.
Polar Pattern
Cardioid
Half-space
Low-Cut Filter
UniSteep
Finish
Black
Features
✓
Outstanding speech intelligibility and transparent sound quality
Outstanding speech intelligibility and transparent sound quality
✓
PivotPoint rotating output connector — changes cable exit point without tools
PivotPoint rotating output connector — changes cable exit point without tools
✓
UniSteep low-cut filter reduces low-frequency ambient noise
UniSteep low-cut filter reduces low-frequency ambient noise
✓
UniGuard RFI-shielding for unsurpassed RF immunity
UniGuard RFI-shielding for unsurpassed RF immunity
✓
Accepts interchangeable elements (cardioid, hypercardioid, omnidirectional)
Accepts interchangeable elements (cardioid, hypercardioid, omnidirectional)
✓
Heavy die-cast case with silicon foam pads minimises surface vibration coupling
Heavy die-cast case with silicon foam pads minimises surface vibration coupling
✓
Phantom powered — self-contained electronics, no external power module needed
Phantom powered — self-contained electronics, no external power module needed
Specifications
| Element | Condenser |
| Polar Pattern | Cardioid (half-space) |
| Low-Cut Filter | UniSteep |
| Power Requirements | 11–52V DC phantom power |
| Interchangeable Elements | Yes — cardioid, hypercardioid, omnidirectional |
| Finish | Black |











